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Polymers 2017, 9(7), 263; https://doi.org/10.3390/polym9070263

Enhancement of Thermal Diffusivity in Phase-Separated Bismaleimide/Poly(ether imide) Composite Films Containing Needle-Shaped ZnO Particles

Department of Chemistry and Material Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
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Received: 27 May 2017 / Revised: 25 June 2017 / Accepted: 27 June 2017 / Published: 2 July 2017
(This article belongs to the Special Issue High Performance Polymers)
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Abstract

Phase-separated polymer blend composite films exhibiting high thermal diffusivity were prepared by blending a soluble polyimide (BPADA-MPD) and a bismaleimide (BMI) with needle-shaped zinc oxide (n-ZnO) particles followed by high-temperature curing at 250 °C. Images recorded with a field-emission scanning electron microscope (FE-SEM) equipped with wavelength-dispersive spectroscopy (WDS) demonstrated that the spontaneously separated phases in the composite films were aligned along the out-of-plane direction, and the n-ZnO particles were selectively incorporated into the BMI phase. The out-of-plane thermal diffusivity of the composite films was significantly higher than those of the previously reported composite films at lower filler contents. Based on wide-angle X-ray diffraction (WAXD) patterns and image analysis, the enhanced thermal diffusivity was attributed to the confinement of the anisotropically shaped particles and their nearly isotropic orientation in one phase of the composite films. View Full-Text
Keywords: polymer blend; thermal diffusivity; soluble polyimide; bismaleimide; needle-shaped zinc oxide polymer blend; thermal diffusivity; soluble polyimide; bismaleimide; needle-shaped zinc oxide
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Uchida, S.; Ishige, R.; Ando, S. Enhancement of Thermal Diffusivity in Phase-Separated Bismaleimide/Poly(ether imide) Composite Films Containing Needle-Shaped ZnO Particles. Polymers 2017, 9, 263.

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